<header class="navbar navbar-fixed-top navbar-inverse">
      <div class="container">
        <%= link_to "sample app", root_path, id: "logo" %>
          <nav>
            <ul class="nav navbar-nav navbar-right">
              <li><%= link_to "Home", root_path %></li>
              <li><%= link_to "Help", help_path %></li>
              <li><%= link_to "Log in", '#' %></li>
            </ul>
          </nav>
      </div>
</header>